cool fuel III interesting trouble

[Bt Doctur]

Got my hands on a unit that a shop had replaced because of a fuel problem. The unit was not cooling the fuel leading to some issues, running ,vapor lock, etc.
Shop replaced the cool fuel unit to restore service to the customer. I got it wanting to dissect it to see how it worked, What I found.
Filter was clean ,no debris
both the hi and low pressure pumps work correctly
upon checking the water cooling passages, they were blocked with sand/debris completely
Rodded with a control core cable, hose flow tested ,full flow thru the unit and the drain port restored
So, should you be experiencing a issue with your unit ,before spending that kind of cash to replace it ,try cleaning the water cooling passage out first and periodically remove the drain plug and let any accumulating things get flushed out
Have a Nice Day
Bt Doctur

 

[Bondo]

Ayuh,..... As always, Great info BD,.....

 

[Lou C]

I’d think that’s common on boats that often run in shallow water and here in the salt pond I wound not be surprised to find crud growing in there, as is common with moored boats with outdrives here. Every year you have to rod out the water intakes or else you’ll have a low water flow problem. In fact I had to remove the plastic screen in the lower unit that OMC used because I constantly had barnacles growing on it.